CrackBerry Genius of Geniuses
Reset the data connection by Options > mobile network > data service: off, then data service: on.
Try the browser after backing out, if that fails, battery pull.
If that doesn't fix it, register the blackberry via Options > advanced options > host routing table. Menu > Register Now.
If that fails, send the servicebooks via the e-mail setup located in the Setup folder. Browse to m.google.ca on your blackberry. If it fails, I can only suggest that you contact your carrier and if you don't have a data plan, tack it on.
Posted from my CrackBerry at wapforums.crackberry.com